کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8362879 | 1542565 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Changes in plant nitrogen acquisition strategies during the restoration of spruce plantations on the eastern Tibetan Plateau, China
ترجمه فارسی عنوان
تغییرات در استراتژی های تولید نیتروژن گیاهان در هنگام بازسازی کاشته های صنوبر در فلات شرقی تبت، چین
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کلمات کلیدی
ترجیح نیتروژن، آمونیوم، نیترات، نیتروژن آلی، بازیابی گیاهان ایزوتوپ نیتروژن پایدار،
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش خاک شناسی
چکیده انگلیسی
Despite the importance of plant nitrogen (N) acquisition strategies for plant growth and the structure and functioning of ecosystems, few studies have investigated the N acquisition preference of plants and their reliance on various N sources (nitrate (NO3â), ammonium (NH4+), and organic N (DON) in soil) during different stages of plantation restoration caused by land-use change. In this study, we used the isotopic mass-balance methods to quantitatively estimate the contributions of N sources (NO3â vs. NH4+ vs. DON) and plant N preferences in spruce (Picea asperata Mast.) plantations of different ages (i.e., 20, 30, 40, 50, and 70 years old) on the eastern Tibetan Plateau, China. Across all restoration stages, while plants in spruce plantations preferred soil inorganic N over soil DON, soil DON was a notable N contributor to plant N nutrition, with 23%-44% of plant N derived from DON. Moreover, with the development of plantation restoration, the N source preferences of plants switched from NO3â (i.e., 20- and 30-yr-old plantations) to NH4+ (age of plantationsâ¯â¥â¯40 years old). Our results suggest that soil DON can be an important N source in alpine coniferous forests. In addition, the shift in the dominant N source during plantation restoration may manifest a strategic adjustment of plant N acquisition in response to changes in soil N availability and/or physiological traits.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Soil Biology and Biochemistry - Volume 119, April 2018, Pages 50-58
Journal: Soil Biology and Biochemistry - Volume 119, April 2018, Pages 50-58
نویسندگان
Ziliang Zhang, Na Li, Juan Xiao, Chunzhang Zhao, Tingting Zou, Dandan Li, Qing Liu, Huajun Yin,